The American auto insurance sector is characterized by the presence of a large number of players. Some are large general insurance companies that have diversified into auto insurance and some are pure play auto insurance companies. Here are some of the notable players in auto insurance business.

State Farm Insurance is one such company. It is a national insurance company and one of the biggest general insurance companies in the US. For the year 2003, the company had a revenue of about $56 billion. Headquartered in Bloomington, Illinois, State Farm Insurance is a very popular auto insurance provider in the US. With a nationwide network of branches and attractive discounts for various categories of people SFI has an edge over its competitors. SFI is also the largest insurer of cars, trucks and SUVs in the US.

American International Group or AIG is another big company. It is the second largest general insurer and also the second largest auto insurer in the US. The Farmers Insurance Group of Companies is one of the largest general insurer and the third largest auto insurer in the US. Like SFI, this company has also got a large network of branches in all the states in the US.

Apart from these, there are other players in the American market. Some of them are 21st century Auto Insurance Group, which has its strength in auto insurance space and operates in eight states. Some niche players include Auto Owners Insurance, which has been operating in the nation since 1916 and covers 22 states across the nation.

One feature of the American auto insurance space is that there is room for all players ? general insurers who have diversified into auto insurance business and auto insurance specialists.